Slow-down sheet-straightener



4SHEEIS-SHEEI l.

Patented July 20, 1920.

C. E. CHHISTOPHEL.

APPLICATION FILED NOV. l0, |919.

SLOW DOWN SHEET STRAIGHTENER.

C. E. CHHISTOPHEL. sLow nowN SHEET STRAIGHTENER.

APPLICATION FILED NOV. I0. |919.

Patented July 20 4 SHEEIS-SHEET 2.

@IOLLesses c. E. cHmsToPHEL. SLOW DOWN SHEET STRAIGHTENER. APPLICATION FILED NOV. l0l 1919.

1,347,145, Patented July 20,1920.

4 SHEEIS-SHEET 3.

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C. E.\CHRISTOPHEL. sLow DowN SHEET STRAIGHTENER.

APPLICATION FILED NOV. I0, 1919. 1,347, 1 45. Patented July 20, 1920.

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W/ T/VESISES CMM TUR/VHS UNITED STATES PATENT oFFICE.

CARL E.. CHRISTOPHEL, OF PEARL RIVER, NEW YORK, ASSIGNOR TO DEXTER FOLDER COMPANY, OF PEARL RIVER, NEW YORK, A CORPORATION OF NEW YORK.

Specification of Letters Patent.

SLOW-DOWN SHEET-STRAIGHTENER.

Patented July 20, 1920.

Application led November 10, 1919. Serial No. 336,833.

improved construction for the mechanism shown and "described in Patent ."Number with the principles of the present inven-f tion;

Fig. 2 is a side elevation, on an enlarged scale, of one of the slow down devices;

Fig. 3 is a fragmentary side elevation of the same showing the parts in changed positions;

Fig. 4 is a top plan view of the same, partly broken away andvpartly shown in section;

Fig. 5 is a bottom plan view of the forward portion of the same;

Fig. 6 is a section on the line 6 6, Fig. 4;

Fig. 7 is a side elevation of the mechanism and power connections therefor.

In the embodiment of my invention shown on the drawings, frame 1 of asheet feeding machine is provided with side brackets 2 within which is journaled a cam shaft 3. A cam 4 on said shaft 3, operates upon the cam roller 5 journaled in one end of a cam lever 6, said cam lever being fulcrumed at 7. A spring rod 8 which is pivotally connected at its forward end to the to a lever arm 13 which is keyed to a rock shaft 14 journaled in the brackets 15, said brackets 15 being supported by transverse stay shafts 16 which extend between the side frames 17. As shown in Figs. 2 and 4, the lrock shaft 14 has keyed thereto a lever arm 18 to which is pivotally connected the rear end of a rod 19. The forward end of the rod 19 is pivotally mounted on a pin 20 which projects later ally from a slide or carriage 21 which is reciprocably mounted on a track bar 22. As shown best in F ig.'A 4, the track bar 22 is provided with a longitudinal recess 23 within the forward end of which a screw 24 secures a cam leaf spring 25. The rearwardly presented end of spring 25 normally assumes the offset position shown in Fig. 4 unless it is pressed laterally by the sheet engaging instrumentality in the manner to be hereinafter referred to. As shown in Fig. 2, the rear end of the leaf spring 25 is provided with a downwardly inclined cam surface 25 which conforms to the rear edge of a guide plate or flange 26 which is adapted to hold said sheet-engaging instrumentality in one of two eXtreme positions during the movement of? said instrumentality in one direction. According to the present embodiment of my invention, said sheet engaging instrumentality comprises a block 27 provided with laterally spaced bearing lugs 281 which are freely pivoted on the pin 20 and a `flared plate 29 which is secured to the block 27 at its forward end and is provided with downwardly presented claws or gages 30 which are adapted to intercept a sheet when lowered into the path of said sheet. Projecting forwardly and upwardly from the block 27 is a cam arm 31 upon which is journaled a roller 32 which is adapted during the forward movement of the slide 21 to move downwardly over the cam surface 25 and into engagement with the cam plate 26 by which it is held depressed throughout the forward movement of the slide 21. Antagonizing the downward movement of the cam arm 31 is a spring 32 which is mounted on a spring rod 33 between a spring rod support 34 and the head of said rod which is pivotally connected by a pin 35 to a lever 'arm 36 which is integral with the block 27.

to raise the claws 30, 30 out of the path of the sheet, these positions of the parts being shown in Fig. 3. YAs shown in Fig. 4, the cam roller 32 is then disposed opposite the Hat portion of cam spring 25 and as the slide moves through its return movement, is adapted to press the cam spring 25 close to the inner Wall of recess 23. It Will appear from an inspection of Fig. 1 that a plurality of these instrumentalities are spaced laterally with respect to the sheet feeding tapes 37 Which serve to move suocessive sheets to the sheet engaging instru-l mentalities. The forward movement of the sheets under the action of tapes 37 is usually more rapid than the;y corresponding movements of the slides 2l so that the sheets are slowed down as they approach the front v gages.

I claim:

'1. In a machine of the y character described, the combination of a track bar, a carriage reciprocable on said trackbar, sheet engaging means movable on said carriage into and out of sheet engaging position, and camming elements mounted respectively on said carriage and track bar, one of said camming elements being movable transversely to the plane of operation of the other of said camming elements to render said camming elements periodically active.

2. In a machine of the character described, the combination of a track bar, va carriage reciprocable on said track bar, sheet engaging means movable on said carriage into and out of sheet engaging position, and camming elements mounted respectively on said carriage and track bar, one of said camming elements being movable by the other into and out of the plane of movement of said other element for rendering one of said elements periodically operative on the other.

3. In a sheet feeding machine, a track bar, sheet engaging means reciprocably mounted on said track bar, a cam element carried by said track bar and operating in a predetermined plane of movement, and another cam element mounted on said track element under normal tendency 4to remain in the path of the first mentioned cam element, said first mentioned cam element being displaced Within its plane of movement by the second mentioned element during the movement of said sheet feeding means in one direction and displacing said second mentioned cam element transversely to said plane and out of sheet engaging means'in one of these posil tions, and a leaf spring cam secured to said cam bar and projecting into the path of a part carried by said sheet engaging means, said leaf spring cam being adapted to move said sheet engaging means into the other of said positions during the movement of said .carriage vin one direction, and to be compressed against said track bar during the movement of said carriage in the opposite direction.

5. 'In a -machine of the character described, a reciprocatory sheet engaging instrumentality movableinto and out of sheet engaging position, a guide -bar for holding said instrumentality in sheet engaging position .during its movement in one direction, and a cam for' guiding said instrumentality into engagement With-said guide bar, said cam being movable into an inoperative position by said instrumentality When moving in the opposite' direction.

6. In a machine of the character described, a track bar, a sheet 4engaging instrumentality reciprocably mounted on said track bar, yieldable means tending to ho'ld said instrumentality in one extreme position during the movement of said instrumentality in one direction, said track har being provided with a flange or guide for holding said instrumentality in an opposite eXtreme position during the movement of said instrumentality in the opposite direction, and a leaf spring cam normally tending to assume a position for displacing said instrumentality from its first mentioned extreme position to the opposite extreme position during the reciprocatory movement in one direction, said instrumentality in its first mentioned extreme position being adapted to displace said leaf spring cam during the reciprocatory movement in 'the opposite direction.

CARL E. CHRISTOPHEL. 

